<template>
  <div>
    <!-- 评论列表 -->
     <van-list
        v-model="loading"
        :finished="finished"
        finished-text="没有更多了"
        @load="onLoad"
        offset="50"
        :immediate-check="false"
      >
    <div class="cmt-list" v-for="itm in obj1" :key="itm.com_id">
      <!-- 评论的 Item 项 -->
      <div class="cmt-item">
        <!-- 头部区域 -->
        <div class="cmt-header">
          <!-- 头部左侧 -->
          <div class="cmt-header-left">
            <img :src="itm.aut_photo" alt="" class="avatar" />
            <span class="uname">{{ itm.aut_name }}</span>
          </div>
          <!-- 头部右侧 -->
          <div class="cmt-header-right">
            <van-icon
              v-if="itm.is_liking"
              name="like"
              size="16"
              color="red"
              @click="loveFn(itm)"
            />
            <van-icon
              v-else
              name="like-o"
              size="16"
              color="gray"
              @click="loveFn(itm)"
            />
          </div>
        </div>
        <!-- 主体区域 -->
        <div class="cmt-body" v-html="itm.content"></div>
        <!-- 尾部区域 -->
        <div class="cmt-footer">{{ itm.pubdate | Datefly }}</div>
      </div>
    </div>
     </van-list>
    <!-- 底部添加评论区域 - 1 -->
    <div class="add-cmt-box van-hairline--top" v-if="show">
      <van-icon name="arrow-left" size="0.48rem" @click="$router.back()" />
      <div class="ipt-cmt-div" @click="show=false">发表评论</div>
      <div class="icon-box">
        <van-badge :content="sum" :max="99" @click.native="fn">
          <van-icon name="comment-o" size="0.53333334rem" />
        </van-badge>
        <van-icon v-if="artId.is_collected" @click="artId.is_collected=!artId.is_collected" name="star" size="0.53333334rem" />
        <van-icon v-else @click="artId.is_collected=!artId.is_collected" name="star-o" size="0.53333334rem" />
        <van-icon name="share-o" size="0.53333334rem" />
      </div>
    </div>

    <!-- 底部添加评论区域 - 2 -->
    <div class="cmt-box van-hairline--top" v-else>
      <textarea v-model="cmt" placeholder="友善评论、理性发言、阳光心灵" v-focus @blur="show1" @keydown.enter="togetFn"></textarea>
      <van-button type="default" :disabled='cmt.length<1' @click="togetFn">发布</van-button>
    </div>
  </div>
</template>

<script>
import {
  commentListAPI,
  commentDisLikingAPI,
  commentLikingAPI,
  sendCommentAPI
} from '@/api/article'
import { Toast } from 'vant'
export default {
  props: {
    artId: {
      type: Object,
      required: true
    }

  },
  data () {
    return {
      obj1: [],
      show: true,
      sum: 0,
      cmt: '',
      loading: false, // 底部加载状态
      finished: false // 底部是否加载完成
    }
  },
  created () {
    this.getCommentListFn()
  },
  methods: {
    onLoad () {
      this.getCommentListFn()
    },
    show1 () {
      setTimeout(() => {
        this.show = true
      })
    },
    async togetFn () {
      const res = await sendCommentAPI({
        target: this.artId.art_id,
        content: this.cmt
      })
      this.obj1.unshift(res.data.new_obj)
      this.cmt = ''
      this.getCommentListFn()
      this.show = true
    },
    fn () {
      // 只有正常的标签才可以添加 id 属性scrollIntoView移到可视区
      // behavior 是 scrollIntoView里面的属性 移动有动画特效
      document.getElementById('gettop').scrollIntoView({
        behavior: 'smooth'
      })
    },
    async getCommentListFn () {
      const res = await commentListAPI({
        artId: this.artId.art_id,
        offset: this.id
      })
      this.id = res.data.last_id
      this.obj1 = [...this.obj1, ...res.data.results]
      this.sum = res.data.total_count || null
      this.loading = false
      if (res.data.results < 10) {
        this.finished = true
      }
    },
    async loveFn (itm) {
      try {
        itm.is_liking
          ? await commentDisLikingAPI(itm.com_id)
          : await commentLikingAPI(itm.com_id)
        Toast.success(itm.is_liking ? '取消点赞' : '点赞成功')
        itm.is_liking = !itm.is_liking
      } catch (error) {
        Toast.fail(itm.is_liking ? '取消点赞' : '点赞成功')
      }
    }
  }
}
</script>

<style scoped lang="less">
/deep/ .van-list__finished-text{
  padding-bottom: 46px;
}
.cmt-list {
  padding: 10px;
  .cmt-item {
    padding: 15px 0;
    + .cmt-item {
      border-top: 1px solid #f8f8f8;
    }
    .cmt-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      .cmt-header-left {
        display: flex;
        align-items: center;
        .avatar {
          width: 40px;
          height: 40px;
          background-color: #f8f8f8;
          border-radius: 50%;
          margin-right: 15px;
        }
        .uname {
          font-size: 12px;
        }
      }
    }
    .cmt-body {
      font-size: 14px;
      line-height: 28px;
      text-indent: 2em;
      margin-top: 6px;
      word-break: break-all;
    }
    .cmt-footer {
      font-size: 12px;
      color: gray;
      margin-top: 10px;
    }
  }
}
/*美化 - 文章详情 - 底部的评论页面 */
// 外层容器
.art-cmt-container-1 {
  padding-bottom: 46px;
}
.art-cmt-container-2 {
  padding-bottom: 80px;
}

// 发布评论的盒子 - 1
.add-cmt-box {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  box-sizing: border-box;
  background-color: white;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 46px;
  line-height: 46px;
  padding-left: 10px;
  .ipt-cmt-div {
    flex: 1;
    border: 1px solid #efefef;
    border-radius: 15px;
    height: 30px;
    font-size: 12px;
    line-height: 30px;
    padding-left: 15px;
    margin-left: 10px;
    background-color: #f8f8f8;
  }
  .icon-box {
    width: 40%;
    display: flex;
    justify-content: space-evenly;
    line-height: 0;
  }
}

.child {
  width: 20px;
  height: 20px;
  background: #f2f3f5;
}

// 发布评论的盒子 - 2
.cmt-box {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 80px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  padding-left: 10px;
  box-sizing: border-box;
  background-color: white;
  textarea {
    flex: 1;
    height: 66%;
    border: 1px solid #efefef;
    background-color: #f8f8f8;
    resize: none;
    border-radius: 6px;
    padding: 5px;
  }
  .van-button {
    height: 100%;
    border: none;
  }
}
</style>
